JP2002272285A - Protective material for field crop - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective material for field crops, for covering the crops such as vegetables and tea trees in order to prevent from damages caused by insect pests and the like. SOLUTION: This protective material is applied for preventing damages of field crops due to birds, insect pests or the like by covering the field crops with the material, wherein an agrochemical 2 is made sustainedly releasable and put on at least the surface of the protective material comprising a thin- layered protecting main body 1 made of a biodegradable resin having meshes 3a or small numerous holes 3b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective material for agricultural crops to be covered on agricultural crops such as vegetables, tea trees and fruit trees for the purpose of preventing damage to agricultural crops by insect pests and birds.

[0002]

2. Description of the Related Art It has been known that vegetables and the like are covered with a crop protection sheet made of a synthetic resin film for the purpose of protecting them from damage by insect pests and the like and obtaining a greenhouse effect. Further, since it is difficult to collect such a crop protection sheet after use, it has been attempted to form the sheet with a biodegradable resin and leave it in the soil as it is. The term “biodegradable resin” as used herein means a resin that is biodegraded by the action of microorganisms in soil or compost and can be naturally returned to soil.

[0003] However, since the conventional one is in the form of a film, there is a problem that although it has an insect repellent effect and a greenhouse effect, it is not possible to secure a sufficient air permeability. There was also a problem that it could not be done. Furthermore, in the case of tea trees, it is necessary to remove the entire sheet to remove the tea leaves, and then
There is a problem that workability is inferior because it is necessary to cover the sheet again.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems and, as a matter of course, can exhibit the basic performance as a crop protection sheet, as well as ensure sufficient air permeability. In addition to being able to spray water and the like from above, it is intended to provide a protective material for agricultural crops that can simplify the spraying of pesticides and can easily pick tea leaves. It is completed.

[0005] The agricultural crop protection material of the present invention made to solve the above-mentioned problems is an agricultural crop protection material used to cover agricultural crops and prevent damage of agricultural crops by birds and insects. The basic configuration is such that a pesticide is supported on at least the surface of a protective material main body made of a biodegradable resin provided with holes so as to be capable of sustained release of the pesticide.
The protective material body of the present invention may be a cap-shaped body having a myriad of small holes, even if it is a soft net having a mesh size such that sprout jumps out when used in a field by covering branches and leaves. The open ends may be buried in the soil so as to cover the seedlings, and these may be used as the inventions of claims 2 and 3. In addition, as the pesticide used in each of the above-mentioned inventions, the one in which the pesticide is encapsulated in a fine capsule so as to be capable of sustained release is most preferable. Furthermore, the protective material body in each of the above-mentioned inventions is a net having a biodegradable resin fiber as a core material coated with a surface layer made of a biodegradable resin in which pesticides are mixed so as to be capable of being slowly released, Although it is preferable in terms of strength and in the production process, the protective material body itself may be formed of a biodegradable resin in which the pesticide is mixed so as to be able to be slowly released. I do.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a main part of a crop protection material of the present invention used for covering a tea tree in a tea plantation, wherein 1 is a biodegradable resin provided with countless meshes 3a. The protective material main body 2 is an agricultural chemical which is supported on at least the surface of the protective material main body 1 so as to be capable of sustained release. The above-described protective material body 1 is, for example,
With biodegradable resin fiber of about 500 denier, 90
The core material is a flexible net knitted into a long length with a width of 0 mm.
The surface layer 1b is formed by coating the surface with a biodegradable resin in which the pesticide 2 is mixed so as to be capable of sustained release.
After cutting to the required length, FIG.
As shown in above, when used over a tea tree, the pesticide 2 on the surface layer 1b is gradually released over time, and the sprout of the tea tree is effectively protected from damage caused by pests and birds. Becomes The biodegradable resin described above is slowly biodegraded under the natural environment by the action of microorganisms in soil and compost, and can be finally decomposed into carbon dioxide and water and naturally returned to soil. And specifically, a polylactic acid resin which is an aliphatic polyester.

[0007] As shown in FIG. 2, when the thus-configured product is used by covering it over a crop such as a tea plantation of a tea plantation, the pesticide 2 can be gradually released on the surface of the protective material main body 1. , The pesticide 2 is gradually released over time, thereby effectively protecting the agricultural crop A from pests and the like. Moreover, the protective material main body 1 is not a non-porous film as in the conventional case, and has excellent breathability due to the infinite number of meshes 3a and there is no danger of root rot. In addition, rainwater and water supply can be directly applied to agricultural crops through the mesh 3a. It can be supplied, and, for example, when it is covered with a tea tree in a tea plantation and protected, the protective material body 1 has a size such that sprout jumps out, for example, a size of 1 to 3 cm on one side. Since the stitch 3a is provided, the sprout can grow out of the stitch 3 without being hindered by the protective material main body 1 as it grows. In this state, only the shoots can be picked out, thus exhibiting excellent workability. Furthermore, since the protective material main body 1 is made of a biodegradable resin, it is sufficient to bury the protective material main body 1 in the soil of the field without collecting and discarding even after use, thereby achieving excellent workability.

The above-mentioned pesticide 2 is preferably one in which a pesticide component is encapsulated in a capsule and adjusted so that the pesticide component is gradually released in a desired amount. Further, in order to allow the pesticide 2 to be supported on at least the surface of the protective material main body 1 made of a biodegradable resin so as to be capable of sustained release, a net knitted with fibers of the biodegradable resin is used as a core material 1a as a core material 1a. Pesticide 2 as described above in biodegradable resin
It is preferable in terms of strength to form a surface layer 1b by coating with a binder in which the pesticide 2 is mixed so as to be capable of sustained release. Then, the pesticide 2 mixed in the protective material main body 1 may be gradually released from the surface.

The protective material body 1 is not a net-like material as shown in FIGS. 1 and 2, but may be a thin perforated film made of a biodegradable resin in which the pesticide 2 is mixed so as to be capable of being released slowly. Alternatively, as shown in FIG. 3, the protective material main body 1 is formed as a cap-shaped body having a required shape retaining property formed from a biodegradable resin sheet material (including a nonwoven fabric) having countless small holes 3b. The application range is extremely wide by providing a protective material having a structure corresponding to various agricultural products, such as providing each of them individually so as to cover the vegetables, and the protective material body 1 is as described above. Countless small holes 3
b, a short flange 1c
It is preferable that the short flange 1c be prevented from falling off when the opening side of the cap-shaped body is used by being buried in the soil.

As described above, the present invention relates to a crop protection material used for covering and protecting the surface of a crop, wherein the pesticide 2 is gradually applied to at least the surface of a thin protection material main body 1 made of a biodegradable resin. The structure is releasably supported, so it has excellent insect repellent and scratch-preventing effects, and is excellent because it can be buried in the field without collection even after use and naturally disappear. In addition to the improved workability, it also eliminates waste pollution, and also has the effect of preventing residual soil and preventing the occurrence of mold when embedded in fields. In addition, since the mesh 3a or the myriad of small holes 3b are provided in the protective material main body 1, it has sufficient air permeability to prevent root rot, and has excellent light-collecting properties and sufficient agricultural production. It can promote natural growth. Further, rainwater and water supply can be directly supplied to the crops from the outside through the mesh 3a and the small holes 3b, and the leaf can be picked with the sheet covered, so that excellent workability can be achieved. Various effects, such as being able to be exhibited, will be achieved.

[0011]

As is clear from the above description, the present invention can, of course, exert its basic performance as a protective material for agricultural crops that prevents damage to insect pests and birds without spraying pesticides. There is an advantage that air permeability can be ensured, water and the like can be sprayed from above, and tea leaves can be picked very easily without removal. Therefore, the present invention greatly contributes to industrial development as a protective material for agricultural products that has eliminated the conventional problems.

[Brief description of the drawings]

FIG. 1 is an enlarged view of a main part showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a usage example.

FIG. 3 is a perspective view showing another example of use.

[Explanation of symbols]

 1 Protective material body made of biodegradable resin 1a Core material made of biodegradable resin 1b Surface layer made of biodegradable resin 2 Pesticide 3a Stitch 3b Small hole

Claims (6)

[Claims] 1. A crop protection material used to cover crops and prevent damage to the crops by birds and insects, wherein the biodegradation is provided with a mesh (3a) or a myriad of small holes (3b). A protective material for agricultural crops, wherein a pesticide (2) is supported on at least the surface of a thin protective material body (1) made of a conductive resin so as to be capable of sustained release. 2. The protective material main body (1) is a soft net having a mesh (3a) large enough to sprout out when used in a field by covering the branches and leaves. Crop protection material. 3. The crop protection material according to claim 1, wherein the protection material body (1) is a cap-shaped body having countless small holes (3b). 4. The agricultural crop protecting material according to claim 1, wherein the agricultural chemical (2) is encapsulated in a fine capsule so as to be capable of sustained release. 5. The protective material body (1) is made of a biodegradable resin having a net made of biodegradable resin fibers as a core material (1a) and a pesticide (2) mixed on its surface so as to be capable of sustained release. Surface layer (1b)
The agricultural crop protection material according to any one of claims 1 to 4, which is coated with: 6. The protective material for agricultural crops according to claim 1, wherein the protective material main body (1) is formed of a biodegradable resin in which the pesticide (2) is mixed so as to be capable of sustained release. .